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P.A.COUPA'L. SEWING MACHINE.

No. 579,426.v Pamted Mar. 23,1897.

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SEWING MACHINE.

Patented Mar. 23, 1897.

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P. A. GOUPAL.y SEWING MACHINE.

Patented Mar. 23, 1897.

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(No Model.)

P. A. GOUPAL. SEWING MACHINE.

Patented Mar. 23, 1897-.

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PETER A. COUPAL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO VILLIAM GORDON, OF SAME PLACE. i

SEWING-MACHINE.

SPECIFICATON forming part of Letters Patent No., 579,426, dated March 23, 1897'. Application iiled flcptemher 9, 1895. Serial No. 561,876. (No model.)

To all whom it may concern:

Be it known that I, PETER A. COUPAL, of Boston, in the county of Suffolk andState of Massachusetts, have invented certain new and useful Improvements in SewingBilachines, of which the following is a specification.

This invention relates to a new and improved machine for sewing' shoes,and particularly to the mechanism whereby the stitch can be set without the use of the needle and while the needle is ont of the stock.

The invention consists incertain novel features of construction and relative arrangement of parts which will be hereinafter fully described in the specification, clearly illustrated in the drawings, and particularly pointed out in the claims.

Reference is to be had to the accompanying six sheets of drawings, forming a part of this application, in which like characters indicate like parts wherever they occur.

Figure l represents a front elevation ot' the machine constructed in accordance with my invention. Fig. 2 represents a side elevation thereof. Fig. 3 represents a side elevation of my machine, the View being taken from the opposite side from that shown in Fig. 2, the hand-wheel and belt-pulley being removed. Fig. i represents a top plan view of my machine. Fig. 5 represents a vertical sectional View of the several parts that make up the framework, the levers being removed in order to show the arrangement ot' the cams. Figs'G to l0 represent different posi tions occupied by the needle, the looper, thread-arm, and thread-hook during the operation of making and setting a stitch.

CL represents the collar of the stand on which the machine rests, the stand not bein g shown.

CL represents the framework of the machine proper, which consists of the bed piece or plate a2, arranged to rest on the collar Ct and be secured thereto in any desired way, and two upright arms a3, which rise from the plate CL2 on opposite sides of the latter and are pro vided with journal-bearings CtX at a suitable distance above said plate and in which is mounted a shaft at These arms a3 extend a suitable distance above the bearings ax and are connected by an overhanging bar a5, as

shown, a web CL(s extending upward from the plate a2 between the arms CL3 and running from the back to the front, the lplate being cut away around the shaft CL4 a suiiicient dis tance to permit the cams to be placed there` on, as shown in Fig. 3, the plate CL2, the arms CL3, bar cr", and the web CLG all being cast in one piece. The front end of this web is formed with a defiecting portion c and with a lug ne", arranged on opposite sides of said web, as represented in Figs. l and 4C. It is to this web that most of the lever mechanisms of the machine are attached.

a7 represents an arm cast integral with one of the arms CL3 and connecting the latter with the web a", this arm ai joining the arm CL3 a short distance belowthe shaft CL4, as shown to the left in Fig. l and in Fig. 3.

as represents an arm on the opposite side of the web from the arm ai and joining the overhanging bar to the top of the web a, as shown in Figs. l, 2, 4, and 5. To one end of the shaft CL4 is secured a hub CL by means of a set-screw am. This hub a carries ahandwheel c and a belt-wheel CLI?, arranged to carry a belt CLIS, that connects the wheel to any desired source of power.

Upon the shaft Ct are rigidly mounted three cam-disks y y y2, as shown in Fig. 5', the disks y and `yi being formed upon their peripheries with path-cams p3 @/4, respectively. Each of the three cam-disks is provided upon each side with a pathscam, as indicated in dotted lines in Fig. 5, the two peripheral path-cams g3 g4 being indicated in full lines. It is from these path-cams that the several parts of the machine derive their motion and by which the several movements are properly timed.

L15 represents a back support connected to the end of a bar al, that is mounted to slide in apertures formed ina lug Ct, projecting from the side ot' the lower edge of the web CL, and in a web als, that extends up a short dis tance from the plate a2 and joins the web c with the arms a3. The rear end of this bar is provided on its under side with rack-teeth d20, that mesh with a pinion C021, loosely mounted on a pin 0.22, that extends outward from a rearward extension d of the web a6. A

ratchetwheel C624 is also loosely mounted Ioo upon this pin and is cast integral with the pinion (L21 or secured thereto in any desired way. The ratchet-wheel is retained on the pin by a nut a2, A coiled spring C025 has one of its ends secured to the pin and its other end to the ratchet-wheel and tends to hold the back support yieldingly against the shoe @21, except when the ratchet-wheel is locked, as hereinafter described.

L28 represents a back gage arranged above the back support C415 and beside its bar am and mounted to slide in apertures in the lug a and web C018. The free end of this back gage is forked to permit the passage of the needle and awl and bears against the shoe above the back gage.

C029 represents a collar part on the back support between the lug a and the web c0111. A helical springer30 is arranged on the back support between the collar a2 and the web 0.13 and holds the forked end of back gage yieldingly against the shoe except where the back gage is locked, as hereinafter described.

@L31 represents a pintle secured in the lower part Of the web d6 by a nut (L32, as shown in Fig. l. Upon this pintle is loosely mounted a hub d, having two lever-arms L33 and CF1. To the end of the arm 6033 is adjustably secured a block (1.42 by means of screws n35. This block carries one or more dogs a3, arranged to engage ratchet-teeth d3T on the back gage (t28, as shown in Fig. 2, to lock said gage. To the end of the arm L31 is secured by a screw L38 a dog as, arranged to engage the teeth of the ratchet-wheel (L21 to lock the latter and the back support. The back gage and back support are locked by the mechanism just described while the stitch is being made and set, but are pressed outward by the springs at other times.

d10 represents a helical spring, one end of which rests upon the plate a2, While the other end is engaged by the block ai, whereby the lever-arms ass L31 are operated to make their respective dogs lock the back gage and back. support, except when the end of the arm L33 is depressed, as hereinafter described.

w13 represents an arm pivoted at one end upon a stud @11, that projects from the web d6. The lower end of this arm carries a setscrew C015, that engages a lug a, secured to the back gage C628, in order to limit the movement of the back gage. To the arm a43 is secured a linger 6F18, that is arranged when said arm is operated to engage an incline d1 on the block (L12 and depress the latter, thereby unlocking the back gage and also the back support.

ao represents a link connecting the arm C013 with the arm @51 of a hub (L53, that is fast on a shaft Z1, so that as the said shaft is oscillated the arm a, with its attached parts, will be operated. The shaft Z1 extends through the web and at its ends is mounted in bearings formed in the arm a7 and in the end of a short arm C652, that projects from the arm d3 below the arm as. Loosely mounted upon the shaft Z1 is a hub Z1", formed with two leverarms Z12 Z111. The arm Z12 carries on its end a roller Z14, arranged in the path-cam @f5 in the outer face of the cam-disk y. The end of the arm Z13 is connected to one end of a link Z1, the opposite end of which is connected to a pin Z1, carried by lugs b1 on one arm of a lever Z18, the opposite arm of said lever carrying the awl Z1. The lever Z1S is pivoted between its ends upon a sliding pintle Z110, one end of which is mounted in the angle-iron .102, that is secured to the lug and extends parallel with the web a6. The opposite end of the pintle Z'11O extends through the web a6 and is there connected to or formed integral with a slotted bar Z111. The lever Z1S is maintained in a predetermined position on said sliding pintle Z110 by nuts Z112, fast on said sliding pintle on each side of said lever.` The motion imparted to the awl Z1 by means of the pathcam gf and its associated parts vibrates said awl to make a path through the stock for the needle, while the motion imparted to said awl by the sliding of the pintle while the awl is in the stock carries the shoe forward, the awl being returned toits normal position by the sliding pintle as soon as the former leaves the stock, the end of the lever Z18 sliding on the pin Z1 without affecting the link Z'15. A lug Z113 is secured to the web d by screws Z114. rl`he lower end of this lug is slotted, as shown in Fig. l, to straddle the link Z15 and steady the latter against any sidewise movement due to the sliding of the lever Z18. The means for operating the sliding pintle Z110 to feed the shoe are best shown in Fig. 3, in which Z115 represents a hub loosely mounted upon a stud Z116, that projects from the upper side of the arm d1. This hub is retained on said stud by a nut Z117 and is provided with two lever-arms Z113 Z111. The arm Z118 carries at its end a roller or projection Z120, arranged in the peripheral path-cam 1/1 of the cam-disk y2. The arm Z119 is slotted at its end and is connected to the slotted bar Z111 of the sliding pintle by a bolt and nut Z121. By means of the construction of the arm Z119 and the slotted bar Z111 the amount of movement of the pintle, and consequently the amount of feed, can be regulated at pleasure.

f represents a hub loosely mounted on the shaft Z1. This hub is formed with two leverarms ff2, the former at its end being provided with a roller f11, that is arranged in IOO IIO

the face of the path-cam y@ of the cam-disk y, while the end of the arm f2 is constructed as a slotted link f3, in which is secured a pulley f 4, under which the thread f5 is arranged, the thread passing through a guide f6, over two pulleys f1 f3, secured to studs on the web a@ on each side of the pulley f1, over a pulley f13 on the end of an arm f1 to the looper G12. The arm fg is pivoted at one of its ends, and a spring f10 is secured to said arm between the pintle and the pulley f13 to exert an upward pull on the pulley and on the thread f5. As the pulley f1 is forced downward between the pulleys f7 f8 it will draw enough thread from the supply for the next stitcl c represents a hub loosely mounted upon a bolt c', secured by a nut c2 in the arm as. This hub is formed with two lever-arms c3 c". The arm c4 at its end is provided with a roller arranged in the peripheral path-cam g3 of the canrdisk y, while the end of the arm c3 is connected by a link 050 to an arm of a bellcrank lever c, that is pivoted on a stud ci, projecting from the web a6. The other arm of the bell-crank lever is slotted, as at es, and in this slot is arranged a pin 09, projecting from the end of a crank c10 on one end of a rock-shaft ou. This shaft is mounted in lugs c, that project from the lug 0c of the web a". A looper c12 is connected to the lower end of this shaft in a position when operated to wrap the thread about the needle when the latter is forced through the shoe or stock, as is common.

7L represents a hub mounted upon the end h2 of a bolt h', as arranged in the top of the web a6, close to the bar a5, as shown. This hub h is retained upon the bolt h2, by a nut h3. This hub, which is on the same side ofthe web as as the backsupport mechanism, carries an arm h4, that midway its ends is provided with a roller h5, that is arranged in the face of the path-cam y? of the cam-disk y. At its lower end this arm is pivoted to one end of a link h6. The opposite end of this link (see Figs. 2 and 3) is pivoted to a meniber hl, that is mounted upon a bolt hs, secured in the lower end of the web a6 by a nut hg. This member 717 carries the needle hw, which, instead of being provided with a slot or eye, is provided with a hook h at its end and is arranged to enter the stock from the opposite side of the awl b9. (Shown in Fig. 2.)

m represents a hub mounted upon an ex tension 'm/ of the bolt h', that is Upon the opposite side of the web a from the end h2 of said bolt. This hub is maintained upon the end m by means of a head m2, and is provided with two arms m3 m4. The arm m3 is provided with a roller m5, arranged in the facehof path-cam ys of the cam-disk 'y'. The arm m4 is formed with a slotted end m6, (see Figs. 2 and 3,) in which is mounted a bolt m7, connected to one end of a link ms. The opposite end of this link is pivoted to the lower end of a pin m9, that is arranged in a bearing m10, secured to the web a6. The opposite end of this pin m9 on the upper side of the bearing m10 is pivoted to one end of a link m11. The opposite end of this link is pivoted to an arm m12 of a rock-shaft m13, that is mounted in the end of the detlecting portion c of the web a6. The opposite end of this rock-shaft is provided with a crank-arm m14, that is pivoted to one end of a verticallymoving bar m15, which between its ends is mounted to slide in a pivoted bearing or eyebolt m16, secured by nut fm" to the lower end of the deflecting portion 0c. To the lower end of this bar m15, by a screw m18, is secureda thread-linger m19, that is located upon the same side of the work as the looper cl2, and to be upon the opposite side from the needle hw and the thread-hook, hereinafter described.

r represents a hub fast on the shaft Z), carryin g arms r r2, by which the channel-guide is operated. Consequently as the channelguide is operated the shaft b will be oscillated, and thereby impart movement to the hub C053 and its connected parts to lock and unlock the back gage and back support. The arm r2 carries a roller r3, arranged in the face of the path-cam y of the cam-disk y2. The

arm r at its end is pivoted to a link r4, that in turn is pivoted to an arm 75, fast upon a rockshaft r6. This rock-shaft extends through the web aG and at its opposite end is provided with a crank pin or lever ri, that is pivoted to a link or rod rs, arranged to slide' in a bearing r9, pivoted to a bolt rw, that is arranged in the end of the angle-iron x2 and the side of the web d, To the lower end of this rod 'rs is secured the channel-guide r11, it being evident from the construction just described that the locking and unlocking of the back support and back gage will be timed with the movements of the channel-guide r11.

t represents a hub loosely mounted on the shaft b. This hub is provided with arms t t2. The arm t at its end carries a roller t3, that is arranged in the face of the path-cam p10 of cam-disk y2. The arm t2 extends from the lower side of this hub and is pivoted to one end of a link t4. (See Figs. l, 3, and e.) The opposite end of this link is pivoted to a strap t5, that carries a pin or bolt t, arranged in the slot 7 of an arm t8, fast upon a hub t. This hub is mounted upon an extension of the bolt b1 on the lower side of the arm a7, as shown in Fig. 3. This hub t9 also carries an arm tm, that extends around .under the lower edge of the web a6, and is provided with a slotted end i, in which, by a screw 7512, is secured a thread-hook im, that is arranged on the same side of the work as the needle and on the opposite side of the work from the looper and the thread-:linger m19.

The operation of the needle, the channelguide, awl, pull-off arm, back support, and back gage are the saine as is common in machines of this class, and a detailed description thereof is unnecessary.

The operation of the means for settin g the stitch while the needle is out of the stock is best illustrated in Figs. 6 to 10. In Fig. l0 I have shown the position of the parts at the beginning of a stitch operation. The threadlinger m19 is close to the stock and the looper has passed the thread over the finger in order to hold the thread in a convenient position for the needle to engage the same, the thread being measured by the pull-off arm and held in the usual way. y The thread-hook t holds the previous loop so that the needle can pass through it. The hook, looper, and linger are stationary, or in the position shown in Figs.

TIO

10 and 6, while the needle enters and leaves the stock, except for a slight movement of the looper and iinger (see Fig. G) after the needle has pierced the stock to insure the thread engaging the needle. As the needle pulls a new loop through the previous loop (see Fig. 7) the thread-hook 13 moves to the left close to the needle to cast off the previous loop and immediately moves to the right a short distance and dwells to remove the new loop from the needle, to throw the previous loop upon the stock or to the position shown in Fig. 8, and to hold the loop while the iinger sets the previous stitch. After the hook tls has completed the operation just described and has come to a dwell the thread-linger, which has a movement toward and away from the stock and which during the operation just described has been held stationary close to the stock, (see Figs. 10 and 7,) is drawn away from the stock to the position shown in Fig. 8 a distance sufficient to set the previous stitch on the needle side of the stock, as shown, the thread rendering about the loop held by the thread-hook. As the thread-iinger completes its movement to set the previous stitch and drops the thread the threadhook i513 moves from the position shown in Fig. 8 to that shown in Fig. 9 to pull through the slack thread dropped by the thread-iinger. Then the thread-hook has a movement toward the stock to assume its init-ial position to hold the loop in position to permit the needle to pass through the same, as shown in Fig. IO. As the thread-hook returns to its initial position after drawing through the slack thread dropped by the thread-'linger the thread-finger takes up the slack of the thread caused by such inward movement of the thread-hook. The thread-iinger afterit drops the thread moves toward the work and engages the thread of the new stitch, (see Figs. 9 and 10,) and, as stated above, when the thread hook moves toward the work the thread-finger again moves outward, as shown in Fig. 0, to take up the slack. The thread- :finger engages the thread continuously, eX- cept at the time when it drops the thread of the old stitch (see Fig. 9) in order that the thread-hook may take up the slack. In the form of machines as shown the thread-iin ger, in addition to the functions already stated, serves to draw the thread from the supply.

From the foregoing it will be seen that the thread-finger sets the previous stitch on the needle side while the latter is out of the stock, the thread rendering about the loop held by the thread-hook and not about the needle. There is a decided advantage in setting the stitch on the needle side, since the stitch is drawn or set against a firm part of the leather and can be set as firm as desired without danger of injuring the leather. Ihen, on the contrary, the stitch is set in the channel of the sole, the strain is liable to tear away the lip or tear the thread through the lip. rIhe thread-hook in its outward movement merely takes up the slack of the thread dropped by the thread-iinger and has no stitch-tightening function, strictly speaking,

The several movements of the parts just described are properly timed with respect to one another by means of the path-cams and lever mechanisms heretofore described.

I do not claim the combination, in a shoesewing machine, with a hook-needle and means for actuating the same, of a stitchtightening device located on the same side of the work as the needle and means for operating said device to engage the loop of thread pulled through by the needle and to tighten the stitch while the needle is still out of the work, as I am not the first inventor thereof, my invention being embodied in the following claims.

Having thus explained the nature of my invention and described a way of constructing and using the same, though without attempting to set forth all of the forms in which it may be made or all of the modes of its use, what I claim, and desire to secure by Letters Patent, is-d 1. In a machine organized for sewing shoes, a hook-needle, a stitch-tightening iinger located on the opposite side of the material to be sewed from the needle, and adapted to set the previous stitch while the needle is out of the work, and a thread-pulling hook located on the needle side, and adapted to remove the loops from the needle, and place them in position for the needle to pass the succeeding loop therethrough.

2. The combination in a shoe-sewing machine with a hook-needle, and means for actuating the same, a stitch-tightening device on the awl side of the work, means for operating said device to set the previous stitch, while the needle is out of the work, and a thread-hook on the needle side of the work, means for actuating the same, said hook being adapted to remove the loop from the needle as it is drawn through the work and the previous loop, and to hold the new loop while the thread-linger sets the previous stitch on the needle side of the work, when the needle is out of the stock, then to be moved to take up the slack, and to place the loop held by said hook in position for the next stitch.

3. In a machine organized for sewing shoes, in combination, a hook-needle and means for actuating the same, a thread-pulling hook located on the needle side of the work, a thread-linger located on the opposite side of the work, means for actuating said parts, said hook being adapted to remove the loop from the needle as it is drawn through the work and the previous loop, and to hold the new loop while the thread-fin ger sets the previous stitch on the needle side of the work, then to be moved to take up the slack, and to place the loop held by said hook in position for the next stitch.

f1. In a machine of the class described, a needle, mechanism for operating said needle IOC IIC

to pass a loop of thread through the material and the preceding loop, means for removing` the last loop from the needle, and means for drawing` the thread from the supply side to set the previous stitch on the'needle side of the material while the needle is out of the material, said rst-mentioned means being,` timed to move thereafter to take up the slack thread on the supply side.

5. In a sewing-machine, the combination with a hook-needle on one side of the work, and a stitch-tightening device on the other side of the Work operating to set the stitch while the needle is out of the Work and oper- PETER A. COUPAL.'

Witnesses:

A. D. HARRISON, C. F. BROWN. 

